Wheel construction.



H. W. SANFORD.

WHEEL CONSTRUCTION.

APPLICATION FILED FEB. 4. 1916.

1,250,229., Patentad Dec. 18,1917.

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To all may concern V I r: Be it known that :11, H Gn W'. S FORD,

a citizen ofitheUnited; States, residingat Knoxville, in the county ofKnox State of Tennessee, have invented certainnew and usefulImprovements in /Vheel Construction, of'which the-following is a specfication, reference beinghad therein to the accompanying drawing.

. This'inventionrelatesto wheel construction, and-has referencemoreparticularly to wheels adapted primarily for mining car service, of thegeneral type or character illustrated and described, for example, i the.United States. Letters-Patent- .0 ALB. Day, No. 1,109,905, dated Sept.-8, 1914, and

the prior patent to myself, Reissue .No. 13,872 dated January 26, 1915.a

.In wheel constructions of the character .under consideration,considerable studyand experimentation haabeen'given tothat feapense,with a less number of parts, and increased wear resisting properties,than is the case with prior constructions, and this may be said to bethe main object or purpose of the resent invention.

The invention, briefly, may be said to include a wheel having anintegral closed end hub part constituting an abutment or end thrustbearing for the axle, upon which the hub is sleeved, the abutment havinga relatively hardened or wear resisting surface, as by chilling, wherebyto effectively take care of the end thrust without the usual incldentwear on the hub cap, and thereby doing away with an independent abutmentmember or wear disk, as largely employed by others at the present time.

In the type of construction embodied herein, it is possible to preservethe advantages of an extended end thrust bearing surface overlying theentire end, or substantially the entire end of the axle, and at the sametime to materially reduce the friction and obviate wear, incident to theengagement between the abutment portion Specification of-zpettersrat nt.'Patented"D'ec. 18, 191*?. V I,ApplicationfiledFebruary4, 1916.SerialNo. 76,145. i I

chilled at the abutment portion .Wlll DQl',

wear when contacted by theend of-the axle in use.

Theinvention will be more readily appreciated fromthe detaileddescription to fo l-" .lowwhen considered in connection with theaccompanying drawings which form a part hereof, and wherein isdisclosed, for the purpose of illustration a convenient and satisfactoryembodiment of the invention.

In the drawings,- the figure is. a longitudinalsectionof a-wheelconstructiomzan emtherein.

bodiment of myinvention beingillustrated With more particularreferenceltol the drawings, like reference numerals refer tocorresponding parts throughout the 'several views, in which 1--is apedestal: having ahollowrextended end adapted for the reception ofahollow hub 2, preferably integral. with the wheel proper 3 having theusual tread sur-facee, 5 is an axleprojecting from, the

p dest l in t e holl w cham er Of t hub2, which .latteris 'ofincreasedClifllneter,

relative to the axle 5 whereby to provide. a

roller c b rfe the r cep ion f s tab roller bearings, 6. Aclosure-wall 7,n aybe provided for the inner end of the hub, said wall having asuitable flange, 7 a -forming-a retaining ring for the terminals orpintles 6 of the rollers. A suitable key 8 of any approved type, suchfor instance, as illustrated in the Day patent above referred to may beprovided for retaining the hub in place on the pedestal, and likewisesuitable packing of grease or the like 9 may be interposed in the spacebetween the hub and adjacent wall of the pedestal.

It is desirable in the present instance to provide a bearing surface forthe end of the axle integral with the hub, and to this end, a suitablehub cap 9 constitutes an integral portion of the hub and a closed endtherefor. The hub cap 9" has a depressed portion 10 forming an inwardlyprojecting end thrust bearing or abutment part 11 surrounded by anannular recessed part 12 adapted for the reception of the terminals orpintles 6 of the rollers 6. The annular wall of the abutment member 11c0- operates with the annular flange 7 of the inner closure wall? of thehub to provide retaining means for the rollers, and in this connection,it will be observed that the abutment member 11 is so proportioned thatthe diameter thereof is greater than that of the end of the axle wherebythe abutment member overlies the outer end of the rollers therebyconstituting an abutment sur face for the outer end of the rollers aswell as an abutment surface for the end of the Wear on the hub cap, andin order to obviate-this wear, thereby increasing the life of the wheelconstruction, Without the necessity of interposing an abutment member orWear washer, it is proposed herein to provide the abutment member 11With a relatively hardened portion 13, and in the embodiment of theinvention herein, this hardened wear surface is provided by chilling themetal in the formation of the Wheel. In the formation of the wheel withthe-relatively hardened wear surface,to receive the direct impact or endthrust of the axle, it is proposed to concentrate the chill tosubstantially the diameter of the abutment portion of the hub cap andpreferably not of sufficient depth to extend entirely through the hubcap, the chilled portion being designated at 13. In this connection, itis obvious that the chill could be made of any desired depth, but it isvery desirable to limit the chilled area whereby to strengthen the wheelstructure, since assuming that if the whole hub were chilled it would bequite impracticable to bore the same as is the usual practice, and theend of the Wheel hub would become more or less brittle with Copies ofthis patent may be obtained for a diameter greater than that of the axleto provide an intermediate roller space, roller bearings posltloned 1nsald space and having terminal central projections or pintles,

a closure member for the inner end of the hub having a flange overlyingthe pintles at this end of the roller bearing, said'hub having anintegral closed outer end with an inwardly projecting thickenedcentrally disposedabutment part for the axle, said abutment forming withthe hub portion an annular recess for the reception of the pintles atthe outer end of the roller bearings, and said abutment being chilled atits inner surface, which chilled inner surface is of a size to overliethe outer end of the body portion of the roller bearings as Well as theend of the axle.

In testimony whereof I hereunto affix my signature in the presence oftwo Witnesses. V

HUGH WHEELER SANFORD. c

lVitnesses C. E. GORE,

V. P. /VRIGHT.

Washington, D. C. I

